"It should be noted that at this point there is no evidence to suggest Mr. Monteith's death was anything other than a most-tragic accident," the coroners office said in a statement.

Yahoo! TV can also confirm the police investigation into Monteith's death has been concluded. The findings indicate that Monteith was alone when he died and there was evidence in his hotel room consistent with the autopsy and toxicology findings of an overdose. The three people the actor was out with the night before were "very cooperative," leaving the police to feel like there is nothing further to investigate.

Girlfriend and "Glee" co-star Lea Michele has issued the following statement to People magazine following the coroners report: "Lea is deeply grateful for all the love and support she’s received from family, friends, and fans. Since Cory’s passing, Lea has been grieving alongside his family and making appropriate arrangements with them. They are supporting each other as they endure this profound loss together. We continue to ask the media to respect the privacy of Lea and Cory’s family."

While Monteith was open about his struggles with substance abuse over the years, the cause of death is still a shock to those who were close to him.

Gia Milani, who recently produced and directed a Canadian film "All the Wrong Reasons" featuring Monteith, said the actor "seemed healthy" when she last saw him four weeks ago in Los Angeles, according to the AP. "He looked super fit and he was energetic and excited," she said.

Sources close to the late actor tell Yahoo! TV that even in the days leading up to his death, Monteith "seemed great."

"He honestly seemed happier and healthier than ever," one insider says, who spoke to Monteith last week. "This is devastating and shocking on so many levels."

Monteith later explained why he decided to share his story with the world: "I felt like I had to step in at some point and relate to people my experience, and relate to people the truth of my life and where I come from."

Our hearts go out to Monteith's family, friends, and girlfriend Michele during this difficult time.